AC 12K 460V TYPE4X C1D2
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Manufacturer Hoffman Engineering
Mfg Catalog # NHZ431246G400
North Coast Part # 1163199


  • Engineered specifically for hazardous location cooling. Not re-built from light industrial air conditioners
  • Attractive design with no heavy cast enclosure and minimal use of visible fasteners
  • Does not require purge and pressurized system
  • Corrosion resistant coating on ambient side components for Type 4X models
  • Corrosion resistant coating on ambient and enclosure side components for Type 4X Offshore models
  • Dust resistant coils for filterless operation in most environments
  • Cleanable, reusable aluminum mesh filter protects coils for extremely dusty and dirty atmospheres
  • Digital temperature control
  • Narrow design to accommodate 12-in (300-mm) deep cabinets
  • R134a earth-friendly refrigerants
  • Models for 115, 230 and 400/460 3-phase VAC power input
  • UL Listed to save customers time and money with agency approvals
  • Easy-Mount flanges for simple installation
  • Standard Type 4/4X models include: - Active condensate management with heater strip - Compresser Heater - Head Pressure Control - Power-off relay for door switch and other system requirements - Malfunction switch
  • Nominal cooling capacities:
  • NHZ28 4000 BTU/hr. (1172 W)
  • NHZ36 6000 & 8000 BTU/hr. (1758 and 2344 W)
  • NHZ43 11000 BTU/hr. (3223 W)
  • Outdoor model operating temperature range from -40 F/ -40 C to 131 F/ 55 C (125 F/52 C on NHZ28 Series and NHZ43 Series 115V)


  • Reference the Spec Sheet in the Downloads tab for complete product specifications.
  • Units with Remote Access Control utilize a digital controller and communicate via EtherNet/IP, Profinet, Modbus TCP/IP and SNMP over ethernet or modbus RTU over USB.


  • Model Code: 28666
  • Bulletin Number: MCLH
  • Catalog Number: NHZ431246G400
  • Description: Stainless Steel Type 4X
  • Width (in.): 11.50
  • Depth (in.): 14.00
  • Fahrenheit Min.: -40
  • Fahrenheit Max.: 131
  • Max Current (A): 3.5
  • Weight (lb.): 138
  • Voltage: 400 - 460 VAC
  • Nominal BTU/Hr.: 11000
  • Nominal Watts: 3223
  • Height (in.): 43.0
  • Standards: UL/cUL Listed; Type 4; 4X; File No. E469720 || CE || Class 1 Div 2 Groups A, B, C, D T4


UPC 78351028666
GTiN 00783510286668
Width 11.50 in
Voltage 460 Volt
Applications Onshore and Offshore Oil and Gas, Chemical and petrochemical, Mining, Pharmaceutical, Any location with potentially hazardous atmospheres created by vapor
Depth 14.00 in
Height 43.0 in
Weight 138 lb
Wattage 3223 Watt
Family Brand Name Hoffman
BTU Hour 11000 BTU
Max Current 3.5 A
Max Temperature 131 degrees F
Min Temperature -40 degrees F
Sub Brand Hoffman

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